Sash balance



Aug. 7, 1928.. v

v s. E.\SNYDER SASH BALANCE Original Filed March 2 1923 2 Sheets-Sheet 6 INVENTOR A TTZiNEY Aug. 7, 1928. 1,679,746-

s. E. SNYDER SASH BALANCE Original Filed Match 28', 1923 2 Sh t -sh t 2 lmlllllll W v V II.

IN VENTOR .Patented Angel 7, 1228.

SAMUEL E. SNYDER, OFIBROOKLYN, NEW YORK.

SASH. BALANCE.

Application filed March 28, 1923, Serial N 0. 828,179. Renewed October 28, 1927.

This invention relates to awindow construction and is directed particularly to the sash balancing means.

The invention is adapted for incorporation in either new or already existing window constructions, and in order to illustrate lts applicability I have shown it both in con- 11 and 12 respectively.

.nection with a new window construction and aconstruction typical of those, now in use. 'In the'drawings:

Figure 1 is a fragmental elevation of a window structure showing the position of the sash balancing means in-dotted lines; Figure 2 is an enlarged fragmental vertical sectional view with both of the sashes in raised positions, the window frame being of a new or specially constructed type to accommodate the sash balancing means Figure 3 is an enlarged sectional view of one of the spring rollers;

Figure 4 1s an enlarged sectional View showing the sash balancing means incorporated in a window; construction representative of the type now in'use,'an d sh0wing the manner in which the said construction is adapted to the sash balancingflmeans; Figure 5 is a horizontal sectional view on the line 5-5 of Figure 4, showing the relative positions of the spring rollers when the balancing means is incorporated in a window construction of the already existing yp i Figure 6 is an enlarged sectional view showing the relation of one of the winding drums with the face plate which closes the recess in which the drum is mounted,'and showing the manner in which the intermediate sash stop is cut away in the already existing type of window construction to per mit the free operation of the drum;

Figure 7 is a detail partly in section and partly in elevation of the means for supporting the-inner ends of the rollers;v and Figure 8 isa perspective view of a fragment of the facing which covers the rollers in the adapted window construction.

Referring now particularly to Figure 2, which illustrates the invention incorporated in a window construction which is especially designed for use with the sash balancing means of this invention, the window frame is indicated by the reference numeral 10, and the upper and lower sashes by the numerals The sashes are guided in their movement and held in position by outer stops 13 and intermediate stops 14. A pair of spring rollers 16 is prodow. frame, the facings 21 and 22 of the casing and by a plate 23, which extends -from the facing 21 to the facing 22 of the casing, and is secured thereto. This plate may either be of metal, veneer or any'othcr suitable material and may be braced by being secured to an intermediate block 23 which depends from the head 20.

Each of these rollers includes a tubular casing-(24 which carries a conical drum 25 at its outer end, and a bearing member 26 at its inner end, which bearing member is rigidly secured to the tubular member by a pin 27 I D The inner end of this tubular casing 24 is supported by a trunnion 28 which is rotatably mounted in a bracket 29.

Arod 30, the inner end 31 of which is loosely mounted in a socket 32 of the bearspring 35 is secured at 36 to the rod 30 and.

encircling the rod, is secured at its other end at 37 to the bearing member 26. Thus the tubular casing 24 and the rod 30, the

casing being permitted to rotate on the rod and the rod itself beingheld stationary.

By thisv construction it will'be'seen that a resilient connection is'establis'hed between when the casing 24 is rotated in one direction the spring therein' wi'll be put under tension so that when the force which rotates the'casing in'such direction is released the spring will tend to rotate the casing in the opposite direction.

In order that the spring 30 may be kept under tension when the roller is removed from its bearings I have provided a pair of openings 36 and 37 the former in the conframe, obviates the necessity for sucha space ical drum and the latter in the rod 30 (see -Figure 3) which openings may be brought channel 38 in which a flexible element such as a wire rope 39, which is secured to the drum at 40, is adapted to wind when the casing is rotated in one direction, and from which it is adapted to'unwind when the easing is rotated in the opposite direction. At the end of the conical member 25 a flange 40' prevents the element 39 from overrunning the end of the drum. This element is secured at 41 to the sash (see Figure 2) so that when the sash i: lowered the casing 24 will be rotated to ,place the spring therein under tension, which tension will tend, when the sash is released, to raise the same and, although not being suflicient to do so automatically, balances the sash so that the manual raising of thesame is facilitated.

It will be noted that each of the sashes is provided with a pair of rollers which operate independently of each other, each roller carrying a flexible element 39 which is attached to the adjacent side of the sash. This permits the springs to operate to compensate for any tendency to uneven raising of the sash, and consequently prevents the sash from canting and binding within the frame.

\ Furthermore the rollers being independently operable, it will be impossible for the flexible members 39 to overrun the drums and become tangled.

The increase of diameter of'the drums is proportionate to the decrease of tension of the springs, so that the force tending to automatically raise the sash is constant throughout the various positions of the sash.

When the invention is incorporated in a new window frame the frame is constructed as illustrated in Figure 2, that is to say, the recesses 18 and 19 are the result of the described arrangement of the facings 21 and 22 of the casing, the plate 23 and the header 20 of the frame. It will be noted in connection with this construction that the mounting of the outer ends of the spring casings 24 in the sockets 34 which are located in the inner faces of the sides of the window as is ordinarily left between the window frame and the wall of the window opening to accommodate the sash weights. This makes it possible to use a casing wherein the 1 facings are of very narrow width and of fied but slightly.

light construction, which gives a greater latitude of trimming and saves considerable material and consequently expense.

When, however, the invention is incorporated in the type of window frame which is now in commercial use-the frame is modi- Such a modified frame is illustrated in Figures 4 to 8 of the drawings. This modified frame includes the usual side pieces with the stops43, 44 and 45, and the header. 46 against which the upper rail 47 of the upper or outside window sash abut".

In this construction a recess 48 is provided for the accommodation of the balancing rollers 49 and 49. This recess is located entirely above the inner or lower sash and is produced by the application of a facing 50 to the inner side of the frame below the header 46 and a plate 51 which extends from the facing 50 and to the intermediate stop 44.

It is thus only possible to raise the inner or lower sash until it abuts against the plate 51, but by locating both of the rollers 49 and .49 in the recess above the inner or lower sash the outer or upper sash is permitted to be raised to its normal extent so as to close the window.

The flexible element 52 which extend from the drum on the roller 49 at eachof its ends operate; through a slot 53 in the plate 51 which slot extends parallel to the face of the drum.

The flexible element 54 which extends from the drum at each end of the roller 49' to the outer or upper sash passes over the upper end of the intermediate adjacent stop 44 and, because of the fact that the drum is located out of the line of movement of the sash, assumes an angular position such as shown in Figure 4.

This angle of course varies as the sashis raised and lowered and, in order that. the

tially parallel with the face of the drum andgradually merges into, the vertical face 57 of the stop, as indicated by the'dotted line .58 in Figure 4.

The side of the window frame is grooved as at 39' to permit the flexible member 39 to wind upon and from the drum 25 without binding. Furthermore the flexible members 39 travelling in the grooves are always concealed and will not interfere with the sash.

I have shown the relation of this plate and stop 44 with theadjacent drum, and have also illustrated the progressive positions of the flexible element 54 as it winds on or pays out from the drumin Figure 6. By this arrangement of the plate and stop the flexible element 54 may follow its natural course in the raising or lowering of the upper sash without binding against the stop 14.

It is of course to be understood that the invention may be used not only in house constructions. where. two sashes are employed, but also in car constructions where but one sash is employed. In the latter use the sash balancing means may be adapted for use in connection with old constructions or in new-' ly constructed cars, in a manner similar to that which has been described in connection with the house construction.

While I have illustrated and described a particular embodiment of my invention, it is to be understood that the invention is not limited to this embodiment, as various changes may be made in the details of con struction and arrangement within the scope of the claims.

What I claim is:

1. A spring roller comprising a casing, a conical Winding drum on one end thereof, a bearing member rigid with the other end thereof and having atrunnion in its outer end, a rod extending longitudinally within and through one end of the casing and having its other end mounted for relative rotation in said bearing member, and a resilient and energy-storing connection between the rod and casing, said drum and rod having openings therein adapted to align for the insertion of a locking pin.

2. A spring roller comprising a casing,

a conical winding drum on one end thereof,

through one end of said casing and having:

its other end supported by and mounted for rotation in the aforesaid socket, and spring means secured to said rod and socket whereby to cause relative rotation of the rod and casing.

In testimony whereof, I have signed my name to this specification this 26th day of March, 1923.

SAMUEL E. SNYDER, 

